Thanks for your interest in our hat kit! we are finetuning this new pattern and hand-dying this beautiful and cozy Cape cod grown rambouillet and mohair blend worsted weifght.. spun by green mt spinnery. The kit comes with a muslin bag, the yarn and original pattern  "Think of Rambouillet as a Merino cousin with a bit more bounce. A great wool to blend with luxury fibers, Rambouillet contributes elasticity without compromising softness. The square, dense, flat-tipped staples have a well-defined crimp that’s somewhat less organized than a Merino’s. With superior softness and good insulating properties, Rambouillet is superb for next-to-the-skin fabrics, baby garments, and other special items.”